at 62 years old, I'm somewhere between casual and avid cyclist; somewhere between comfort and speed oriented. I ride for excercise but also do some century rides in the foothills on my 25 year-old Nashbar Tour E. I ride one mile on dirt/gravel from my home to the pavement. In riding hundreds of miles these self-sealing tubes have never let me down

I bought these tubes (and brand new tires) to put in an old loaded tourer that I use for riding to the store and 6-10 mile rides on jogging paths near the canals in the neighborhood. Had a flat in the first 4 miles, tubes didn't begin to self seal.

About a week ago, I picked up a finish nail in the sidewall of the rear tire. Sealant oozed out of the tire, but never really cured around the hole. After a week of pumping and trying to lay the bike on its side to get more sealant out of the hole, I went ahead and replaced the tube with a traditional one.

I'm two-starring it out of comparison to several tubeless systems I've seen for use with traditional tires that claim to be able to screw wood screws into the tire - a single finish nail shouldn't have been an issue.

My fallback will probably be a standard tube with a squirt of Stan's or Slime instead of the pre-slimed tubes. But i'm going to run the non-slimed tube until it gets punctured.

I train in the foothills on roads with gravel on the shoulders and subsequently get flats due to stone bruising.Our roads are dirtier because of the long winters and the need for gravel on the asphalt.These tubes will give me fewer flats and more riding time.

I have over 100Kmiles/160Kkm experience, both commuting/touring, and use only tubes with only Slime/Nashbar Self-sealing. I pedal most everyday and solo tour when possible. Recently (19-22NOV2011), I pedaled a circular 283 miles/453kms from El PasoTX to Old MesillaNM to DemingNM through ColumbusNM to mm107.5 back to El Paso. My first day out,19NOV2011, I was pedaling NM404 West when my rear tire finally wore out after 2000+miles/3200kms and the tube blew at mm2.5. I replaced both, with particular emphasis on inserting my favorite tube, the Nashbar self-seal. I recorded this specific act in pix and have put them on my Facebook page under Irene's Pedal; please friend me to view them!

I had this along with a Panaracer TG on my front rim commuting for close to a year with no flats, whereas I used to get a few a month. I was surprised one morning trying to add air to the tire to find the valve gummed up - I must have gotten a puncture near the valve that invoked the fixit-goo, so I chopped off the valve. (RIP) I replaced it with a regular tube - then got 2 flats within a week. I am ordering more of these for my commuter.

74 year-old courier/commuter. Gummed up a good Zefal pressure gauge first thing. Gummed up 2 Schrader valve cores (seemed to work OK with Prestas) Later realized these tubes have no use when you purchase decent tires. They might or might not get you to town in a puncture, but you still have to replace the tube -- they don't patch well. And if a nail goes through the tube you have to deal with it pronto -- they won't run long with a nail sticking through.